278903domain: NPropertiesPrimalityPrimeyesAppears in sequencesNumber of base 23 circular n-digit numbers with adjacent digits differing by 6 or less.at n=5A125411Primes p such that 30*p-1, 30*p+1 and 36*p-1, 36*p+1 are twin primes.at n=21A138696Prime numbersat n=24354